klipshorn speakers

Hope you're aware Klipschorn can run on as little as a couple watts, 300w of 7300 is complete overkill. I'd never like Klipschorns with high powered solid state amp, but then I'm sensitive to things like timbre, tonality. I run my highly modded Klipschorns with SET and push pull tube amps, much more sympathetic partnering imo.
I don't consider Klipshcorns to be head banger speaker, really need subs for that kind of bass. Yes, they'll get plenty loud, but might run you right out of room, in stock form they can get shouty at loud volumes. They also need proper corner placement with extreme care in getting speakers to seal with wall for maximum bass output, they also want a larger room for optimum sound quality. While I love my Klipshcorns, I'd not recommend these for what I presume you're looking for.

I sold Klipschorn for a couple of years. That treble from the horn was sword sharp,the imaging gawdawful from the extreme lack of time coherence between drivers. Just not for me, though I imagine the distortion characteristics of lower-order harmonic distortion rich SET’s probably match up well.  I can think of many other speakers with much deeper and better bass response. 

Heard a lot of people’s Klipschorns, in a lot of different rooms, even in 4 corners and even stacked, and been impressed maybe twice. It’s one of those speakers that posers buy for the name and don’t dial them in well. Shouty and piercing more times than not IMO. 

I owned them for years and really enjoyed them with all genres of music. They can be played very loud, but that's not their finest virtue. If you have the space and a good system preceding them, there will be beautiful music. Maybe not the most accurate, but beautiful.

The Klipschorn hasn't been a speaker of so much talk for 60 years for no reason. There's something interesting, some say magical, there. It's an iconic audio piece and looks beautiful in the right room. 

If he wants loud chest thumping sound with no perceivable limit, then yes go for it. They do great in the kickdrum frequency area.  If he wants bone rattling bass then add a sub.. However, when I crack mine up with bassy tracks like "Flight of the Cosmic Hippo" I swear they go deeper than they're given credit for.  Wow.  

Either way, they're meant for jazzy acoustic music which is where their flavor meets the mood IMO.

Btw, I run them on Mcintosh and PS Audio M700 class D amps.. Both sound supurb and get really loud with zero distortion.  It's a party setup for sure.